Sash-weight pulley



Patented Oct. 4, 1927. I

UNITED STAT ERNEST S. REILAND AND PETER M. REILAND, OF ST. PAUL, MINNESOTA, ASSIGNORS TO HOWARD L. FISCHER, OF ST. PAUL, MINNESOTA.

SASI-I-WEIGHT PULLEY.

Application file-d May 21, 1925. Serial No. 31,813.

Our, invention relates to sash weight pulleys wherein it is desiredto provide a pulley of a simple construction and provided with means for supporting the pulley so that it will operate freely and eliminating practically entirely thenois'e of the operation of the pulley when the window is raisedand lowered.

Heretofore sash weight pulleys and housings have been manufactured which are of an ordinary construction with a metal pin extending through the housing and the pulley is adapted to be supported directly upon the metal pin. This form of sash weight pulley is very noisy in operation after it has been used for a while and becomes rusty or dried. Then these pulleys musthe made very cheap and they are concealed in. the casing in a manner so that they are not easily accessible for lubricating. Thus such sash weight pulleys are not desirablewhere one wishes to have thewindow operate freely on the sash pulleys and without a squeaking noise. F fe have designed a sash weight pulley to overcome these detrimental features and which is more economical to manufacture owing to the simplicity in the construction.

A feature of our sash weight pulley re sides in the housing portion being made up of sheet material and stamped out, the portions of the parts being welded together.

It is also a feature of our invention to provide tongues formed inthe housing which may be bent over to-engage the pulley receiving member of the sash frame so that no screws are necessary to hold our pulley in position in the sash frame. Our invention also includes a large non-metallic bearing treated in a lubricant and upon which the pulley is adapted torotate so as to form a practically noiseless pulley together with side washer members which space the pulley from the housing and which rotate freely with the same.

Other features and advantages, together with the peculiar construction of our sash weight pulley will be more fully set forth in the specification and claims.

In the drawings forming part of our specification:

Figure 1 is a perspective view of our sash weight pulley.

Figure 2 is a central cross section of the same illustrating a portion of the supporting casing or window frame.

Figure 3 illustrates our pulley.

Figure 4 illustrates the plate used in the formation of the housing of our pulley.

In the drawings our sash weight pulleyv A is supported in the casing B which is formed of sheet material and which can be readily stamped out by dies or other suitable means so as to form the sides 10 and 11.

The sides 10 and 11 are practically identical in shape, having curved end portions 12 which meet alongthe line'13. The sides 10 and 11 are of sufficient width to form a cover for either side of the pulley C and the pulley is supported between the sides so that it will project on either side'of the housing B. This permits the window support or cord, not illustrated in the drawings,'to be readily received into the groove 14 in the pulley C. The side members 10 and 11 are adapted to be secured to the face plate 15 which is formed with side supporting lugs or ears 16 which are stamped out in the formation of the plate 15 and are illustrated in Figure 4 in the position they assume before they are bent upright on one end of the plate and in the position they assume when bent upright on the other end of the plate. These lugs 16 are bent at approximately right angles to the plate 15 and are adapted to engage the inner surface of the sides 10 and 11 and be spot welded or otherwise secured to the side walls of the pulley. The housing B of thepulley A is formed with tongue members 17 which are positioned near the curved ends 12 of the housing and these tongues are adapted to be bent over as illustrated in Figure 4, to engage the back of the window frame D. as illustrated in Figure 2, on one side of the pulley A, while on the other side the tongue 17 is partially bent over showing the manner in which it is bent down to engage against the inner surface of the frame D. Each pulley has four tongues 17 two on each side, and they may or may not be used to hold the pulley A to the window frame D. As a matter of convenience the plates 15 are formed with openings 18 for screws which are adapted to attach the pulley to the frame, if it is so desired. However, the holding tongues 17 are amply suflicient to hold the pulley A in rigid position attached to the frame.

The pulley C is formed with an. axial opening 20 which is large compared to the ordinary old forms of sash weight pulleys, and

we provide thislarge opening so as to form a bearing means of suflicient size to permit the pulley to operate more freely.

The side members 10 and 11 are formed with embossed recesses 21 which are adapted to receive the bearing block 22 in the assembly of our pulley A, while the bearing block is held in the recesses- 21 by the rivet pin 23 which is upset on either end so as to rivet the bearing block rigidly in place between the recesses 21 and extending between the side walls 10 and 11.

In assembling the pulley A the pulley is slipped onto the bearing block 22, and washer members 24, of a non-metallic material, are positioned on either side of the pulley. The side members 10 and 11 arethen positioned on either side of the bearing block 22 and the rivet23 is inserted and made fast in place to clamp the sides 10 and 11 together and to rigidly fix the block 22 between the same. The bearing block 22 is formed of wood, fiber or any suitable non-metallic material, and is treated with a lubricant so that it is practically saturated with a lubrieating substance. The washer members 24L can also be treated with a lubricant it it is desired, and these washers form spacers on either side of the boss 25 formed about the opening 20 of the pulley. The boss surfaces 25 on either side of the pulley C form a flat bearing surface for the spacers 24. These spacers are freely positioned and may rotate with the pulley or can be held stationary by reason of being fitted snug to the bearing block 22.,

In operation the pulley C rotates upon the lubricated bearing block 22 and bears only slightly against the spacers 24. This permits the pulley G to operate freely with-out noise and provides a lubricating block hearing which is firmly held in position to permit the pulley to rotate about the same. By

tests applicants have operated this pulley for an extensive period of time and has found it, to be far more desirable than a sash weight pulley having a metallic supporting shaft. The large, rigidly fixed bearing block in applicants pulley provides a very practical bearing surface for the pulley so as to permit it to operate freely. In this manner we provide a sash weight pulley of a very desirable construction, economical to manufacture and having a far greater-durability.

In accordance with the patent statutes we have described the principles of operation of our sash weight pulley, together with the particular formation and construction of the same, and while the drawings illustrate a particular formation we desire to have it understood that this is only illustrative and that the pulley can be adapted to other uses and applied to consructions other than those above set forth within the scope of the following claims.

We claim:

1. A pulley comprising a pulley wheel, a

casing for said pulley wheel having recesses in the sides thereof, a bearing block of non-- metallic lubricant impregnated material for said pulley wheel seated in said recesses, 7

means extending through the bearing block and the sides of the casing to clamp the bearing block tightly in place.

2. A pulley comprising a pulley wheel, a casing for said pulley wheel, a bearing block of non-metallic lubricant impregnatedmaterial for said pulley wheel, means for pinching said bearing block between the sides of said casing and adapted to extend through said bearing block and the sides of said casing to clamp the bearing block tightly in place.

ERNEST s. REILAND. PETER M. REILAND. 

